Test via the spectrometer(the performance of blue light blocking):block 89% within 500nm,block 91% within 490nm,block 93% within 480nm,block 94% within 470nm,block 96% within 460nm,block 98% within 450nm,block more than 99% within 400nm-440nm.

Serious color distortion due to 90% blue color was filtered out.Please check Eyekepper BB40,BB60 and BB90 lenses if you do not like serious color distortion.